• Reading time:33 mins read
  • Post category:AR-15 / BCG
  • Post last modified:July 14, 2023
  • Post published:January 9, 2021

Best AR-15 BCG - Editor's Choice

What is AR-15 BCG? 🔔

It is a crucial component of the AR-15 rifle, which is a popular semi-automatic rifle platform. The BCG is responsible for loading, chambering, firing, and extracting cartridges from the rifle’s barrel.

Watch this video to find more information 💻

Parts 🔑

  1. 🔩 Bolt: The bolt is the component that locks into the barrel and contains the extractor and ejector.
  2. 🚀 Firing Pin: The firing pin is a small pin that strikes the primer of the cartridge to ignite the propellant and initiate firing.
  3. 🔧 Cam Pin: The cam pin is a cylindrical pin that connects the bolt to the bolt carrier and enables rotational movement during cycling.
  4. 🔑 Gas Key: The gas key is attached to the bolt carrier and interfaces with the gas tube. It redirects the gas from the fired round to drive the BCG.
  5. 💥 Firing Pin Retaining Pin: This pin holds the firing pin in place within the bolt carrier to prevent it from freely moving.
  6. 💪 Bolt Carrier: The bolt carrier houses the bolt and reciprocates back and forth during the firing cycle. It is responsible for cycling the action and extracting/ejecting spent cartridges.
  7. 🔁 Gas Rings: These rings are installed on the bolt to create a gas seal within the bolt carrier, ensuring efficient gas transfer.
  8. 🔧 Extractor: The extractor is a hook-like mechanism on the bolt that grips the rim of the cartridge case for extraction.
  9. 💢 Extractor Spring: This spring provides tension to the extractor, allowing it to securely grip and extract spent casings.
  10. 🔄 Ejector: The ejector is a small plunger on the bolt face that pushes the spent cartridge out of the ejection port.

Best AR 15 BCG

Coating Types ⌛

🌈 Phosphate Coating: Also known as Parkerizing, this is a traditional coating that provides corrosion resistance and lubricity. It typically appears as a dull grey or black finish. 🔥 Titanium Nitride (TiN) Coating: TiN coating provides a hard, low-friction surface with good corrosion resistance. It is often applied to BCG components like the bolt and extractor. The finish is typically gold or bronze.
🌟 Nickel Boron Coating: This coating, also known as NiB or NiBo, involves electroless nickel plating with boron particles. It offers excellent lubricity, corrosion resistance, and ease of cleaning. The finish is typically silver or matte grey. 🛡️ Chrome Coating: Chrome plating provides enhanced corrosion resistance and durability. It can be applied to the entire BCG or specific parts such as the bolt carrier. The finish is typically shiny and silver.
🧪 DLC Coating: DLC (Diamond-Like Carbon) is a durable coating that provides excellent hardness, wear resistance, and corrosion resistance. It is often used for enhanced durability in demanding conditions. The finish can be black or dark grey. 🌬️ Nitride Coating: Also known as Melonite or QPQ (Quench-Polish-Quench), this is a case-hardening treatment that provides increased surface hardness, wear resistance, and corrosion resistance. The finish can range from black to dark grey.
🍃 Cerakote Coating: Cerakote is a durable ceramic-based coating that offers corrosion resistance, abrasion resistance, and customization options in terms of color and pattern. The finish can vary depending on the specific Cerakote color applied.
Our Top Pick
Lantac Enhanced Full Auto Style AR 15 BCG
This forthcoming model comes with a higher price tag and additional features. It includes a bolt carrier group made of sturdy 8620 steel coated with innovative nickel-boron with advanced UTC EXO technology. This ensures durability and smooth operation of the BCG.
Buy Now On OpticsPlanet
If you click this link and make a purchase, we earn a commission at no additional cost to you.

Features 🧲

🚀 Reliable Functioning: The AR-15 BCG is designed to reliably cycle the rifle’s action, ensuring proper feeding, chambering, firing, and extraction of cartridges.
💪 Durable Construction: BCGs are typically made from high-quality materials such as steel or aircraft-grade aluminum alloys to withstand the stress and pressures of firing.
🔧 Interchangeability: It is designed to be easily interchangeable, allowing users to swap BCGs for different purposes or configurations.
🔄 Gas System Compatibility: The BCG is compatible with various gas systems, including direct impingement and piston-driven systems, to accommodate different AR-15 configurations.
🌬️ Self-Lubricating: The BCG incorporates strategic surfaces and coatings that provide inherent lubricity, reducing friction and enhancing reliability even in adverse conditions.
💥 Enhanced Extraction: The extractor, combined with proper tension from the extractor spring, offers secure and consistent extraction of spent cartridge cases.
🔩 Easy Maintenance: The BCG is designed for straightforward disassembly, cleaning, and maintenance, allowing users to keep their AR-15 in optimal working condition.
🛡️ Corrosion Resistance: Many BCGs feature coatings like phosphate, nickel boron, or chrome to provide corrosion resistance, protecting the BCG from environmental elements.
🎯 Precision Machining: BCG components undergo precise machining processes to ensure proper fit, function, and alignment within the AR-15 platform.
🔧 Forward Assist Serrations: Some BCGs include serrations on the bolt carrier to facilitate the use of a forward assist for manually chambering a round if needed.

AR-15 BCG Review| Best AR-15 Bolt Carrier Group

ImageProductBrand
Aero Precision 5.56 AR15 Bolt Carrier GroupAero PrecisionBUY
Lantac Enhanced Full Auto Style Bolt Carrier GroupLantacBUY
Faxon Firearms Gen 2 9mm PCC Bolt Carrier Group CompleteFaxon FirearmsBUY
ODIN Works Nitride Bolt Carrier GroupODIN WorksBUY
Armament AR-15 Bolt Carrier GroupArmamentBUY
JP Enterprises Complete JPBC Bolt Carrier Group .223 CaliberJP EnterprisesBUY
Griffin Armament Enhanced Mil-Spec Bolt Carrier GroupGriffin ArmamentBUY
F-1 Firearms Durabolt 5.56 Bolt Carrier GroupF-1 FirearmsBUY
Aero Precision AR15 6.5 Grendel Bolt Carrier GroupAero PrecisionBUY
ODIN Works Bolt Carrier ACC-.223 -BCGODIN WorksBUY
Midwest Industries 5.56/AR15 C158 Bolt Carrier GroupMidwest IndustriesBUY
Guntec USA AR-15 Bolt Carrier Group Mil-Spec BCGGuntec USABUY
TRYBE Defense Milspec AR15 223/5.56/300 AAC Complete Bolt Carrier GroupTRYBE DefenseBUY
Phase 5 Tactical AR-15 Black Complete Bolt Carrier GroupPhase 5 TacticalBUY
BONUS: CMMG, Inc 22LR Mk4 Barrel Kits w/ Bolt GroupCMMGBUY

1# Aero Precision 5.56 AR 15 BCG

Aero Precision 5.56 AR15 Bolt Carrier Group

Specification

Material: 8620 Steel
Caliber: 5.56x45mm NATO
Gun Model: AR-15

The first on the list is a good choice for good money. This BCG is rather durable thanks to the nickel-boron finish and an 8620 tool steel carrier with a 5.56 9310 steel bolt. In addition to this, the bolt carrier group is shot-peened and magnetic particle inspected. It’s easy to clean, and it looks great. The forward assist serrations ensure smooth work, so you can count on this model.

Video review

Pros:
  • Price
  • Durability
  • Nickel-boron finish
  • Easy to clean
  • Forward assist serrations
Cons:
  • Compatibility

 

2# Lantac Enhanced Full Auto Style AR 15 BCG

Lantac Enhanced Full Auto Style Bolt Carrier Group

Specification

Caliber: 5.56, 7.62
Gun Model: AR-15
Gun Frame Size: Small
Hand: Right

The next model costs more and offers more as well. It’s a high-quality bolt carrier group machined from 8620 steel with an innovative nickel-boron coating with advanced UTC EXO, which means this BCG is durable and it ensures smooth operation. Thanks to the unique design and forward porting, the upper receiver’s pressure is reduced. It’s a well-designed, reliable model that is compatible with full- and semi-auto rifles. Plus, it comes with a lifetime warranty.

Video review

Pros:
  • Durability
  • NiB UTC EXO coating
  • Forward porting
  • Compatibility
  • Lifetime warranty
Cons:
  • Price

 

3# Faxon Firearms Gen 2 9mm PCC AR15 BCG

Faxon Firearms Gen 2 9mm PCC Bolt Carrier Group Complete

Specification

Colour: Black
Finish: Salt Bath Nitrided
Material: Mil-Spec 8620 Steel
Caliber: 9mm Caliber
Gun Model: AR-15
Weight: 14.9 oz

If you think that there is nothing that can surprise you, just look at this model. Although it is cheap, it offers an interesting solution for your AR-15. This is a 9mm bolt carrier group that is dual-compatible with Colt and Glock. Made of solid 8620 steel with a salt bath nitride finish, this BCG can be a good add-on for your firearm. Based on our experience due to the ramped bottom, you can use any common trigger. Moreover, it’s compatible with MP5 magazines, M-16 (full-auto) rifles, and JP Enterprises buffer systems.

Pros:
  • Price
  • Compatibility
  • Nitride finish
Cons:
  • Durability

 

4# ODIN Works Nitride AR 15 BCG

ODIN Works Nitride Bolt Carrier Group

Specification

Colour: Black
Finish: Nitride
Material: Steel
Caliber: 6.5mm Grendel
Gun Model: AR-15

This group is for 6.5mm Grendel caliber, and it’s also made of case-hardened 8620 steel. The nitride finish allows you to use less lubricant, saving a low friction rate. The bolt carrier group is Mil-Spec compatible, high-pressure tested, and magnetic particle inspected. The gas key is properly staked. This is a good purchase if you are looking for this caliber.

Video review

Pros:
  • Price
  • Nitride finish
  • Fully tested
  • Durability
Cons:
  • Compatibility

 

5# Armament AR-15 Bolt Carrier Group

Armament AR-15 Bolt Carrier Group

Specification

Fabric/Material: 9310 Steel, 8620 Steel
Caliber: 5.56x45mm NATO, .223 Remington
Gun Model: M16, AR-15
Weight: 0.82 lb

Another good solution for 5.56x45mm NATO, is .223 Remington calibres for M-16 and AR-15 rifles. An MPI-tested 9310 steel bolt and 8620 tool steel heat treated and case-hardened carrier with a tool steel properly staked gas key ensure enjoyable, smooth shooting for a low price. You can be sure about durability if you decided to install this bolt carrier group.

Pros:
  • Price
  • Durability
  • MPI tested
Cons:
  • Low on features

 

6# JP Enterprises Complete JPBC AR 15 BCG

JP Enterprises Complete JPBC Bolt Carrier Group .223 Caliber

Specification

Caliber: .223 Remington
Gun Model: AR-15
Gun Frame Size: Small
Hand: Right

If you are looking for something unusual that will give more space for customization and improvements, this bolt carrier group for .223 Remington will suit you well. First of all, it’s a durable thing, that will last endlessly. Besides, it offers a range of features you can’t find anywhere else: increased firing impulse, improved reliability and accuracy, reduced pin wear, and innovative ergonomic design. All these features are possible, thanks to the great JPBC compatibility.

Pros:
  • Durability
  • Good firing impulse
  • Improved accuracy
  • Reduced pin wear
Cons:
  • Price

 

7# Griffin Armament Enhanced Mil-Spec AR 15 BCG

Griffin Armament Enhanced Mil-Spec Bolt Carrier Group

Specification

Finish: Melonite QPQ
Material: 4340 Alloy Steel, 9310 Steel, 8620 Alloy Steel
Caliber: 5.56x45mm NATO, .300 AAC Blackout
Gun Make: AR Platform
Included Accessories: Cam Pin and Extractor, Crane O-Ring, Gas Key, Carrier, Bolt

We love this model because it’s very balanced. For a cheap price, you can get a well-designed 5.56x45mm NATO, .300 AAC Blackout bolt carrier group for AR-based rifles that consists of an 8620 alloy steel carrier, a 9310 steel bolt, and a 4340 alloy steel cam pin with extractor. The melonite QPQ finish makes operation smoother and reduces the use of lubricants. As a result of using this product, we found that the bolt is heat-treated and shot-peened, and the gas key is staked properly. You will be also glad to know that the crane O-ring is used here to increase extraction reliability.

Pros:
  • Price
  • Durability
  • Compatibility
  • Increased extraction reliability
Cons:
  • None

 

8# F-1 Firearms Durabolt 5.56 AR 15 Bolt Carrier Group

F-1 Firearms Durabolt 5.56 Bolt Carrier Group

Specification

Caliber: 5.56x45mm NATO
Gun Model: AR-15

Regarding this model, there is nothing much to describe because it’s just a good, durable bolt carrier group that is designed for AR-15 platforms and compatible with any Mil-Spec components. This BCG is rated for full-auto rifles, which is also a good advantage. High-quality coatings that are used here ensure not only durability but also a smooth shooting experience.

Pros:
  • Durability
  • Compatibility
  • High-quality coatings
Cons:
  • Price

 

9# Aero Precision AR15 6.5 Grendel AR 15 Bolt Carrier Group

Aero Precision AR15 6.5 Grendel Bolt Carrier Group

Specification

Colour: Black
Finish: Nitride
Material: 8620 Steel
Caliber: 6.5mm Grendel
Gun Model: AR-15

Another inexpensive bolt carrier group for 6.5mm Grendel. The material used here is standard 8620 steel with a black nitride finish that reduces friction. The bolt is shot-peened, HPT tested, and MPI marked. Thanks to the forward assist serrations, the BCG works better. Besides, the installed O-ring makes the extraction easier.

Pros:
  • Price
  • Durability
  • Forward assist serrations
  • Better extraction
Cons:
  • Compatibility

 

10# ODIN Works AR 15 Bolt Carrier Group

ODIN Works Bolt Carrier ACC-.223 -BCG

Specification

Colour: Black
Gun Model: M4, AR-15
Caliber: .223

ODIN likes to make customers happy with affordable solutions. This bolt carrier group has Mil-Spec dimensions and it’s used for AR-15 and M4 rifles for .223/5.56mm, .300 Blackout calibers. The material used to manufacture this BSG is case-hardened 8620 steel finished with black nitride, which increases durability and lowers friction rate. There is also an O-ring on the extractor. High pressure tested and magnetic particle inspected.

Video review

Pros:
  • Price
  • Durability
  • Low friction rate
  • Better extraction
Cons:
  • None

 

11# Midwest Industries 5.56/AR15 C158 AR 15 BCG

Midwest Industries 5.56/AR15 C158 Bolt Carrier Group

Specification

Gun Model: AR 15
Gun Platform: AR

This model is a bit less durable, compared to the previous ones. The bolt is made of Carpenter 158 and it’s also heat treated, shot peened, precision ground, and magnetic particle inspected. The black nitride finish, however, does its work and increases durability, making operation smoother. Other elements are also reliable. The 4140-billet gas key, for example, is torqued with grade 8 fasteners and has the proper positioning. The O-ring is also used.

Video review

Pros:
  • Price
  • Black nitride finish
  • Better extraction
  • Heat-treated, shot-peened, MPI marked
Cons:
  • Durability

 

12# Guntec USA AR-15 Bolt Carrier Group Mil-Spec BCG

Guntec USA AR-15 Bolt Carrier Group Mil-Spec BCG

Specification

Gun Model: AR 15
Gun Platform: AR
Caliber: .223, 5.56, .300 AAC(BLK)

A very standard bolt carrier group with an 8620-steel bolt carrier and an MPI 9310 bolt coated with PVD that offers an enjoyable shooting experience by lowering friction rate and ensuring good durability. The only curious thing about this model is its colour because it’s a kind of rainbow gradient that looks unusual. However, you will never get disappointed by this BCG.

Pros:
  • Durability
  • Design
  • Low friction
Cons:
  • Low on features

 

13# TRYBE Defense Milspec AR15 Bolt Carrier Group

TRYBE Defense Milspec AR15 223/5.56/300 AAC Complete Bolt Carrier Group

Specification

Gun Model: AR 15
Gun Platform: AR
Caliber: .223, 5.56, .300 AAC(BLK)

One more cheap bolt carrier group that works with 223, 5.56, and .300 AAC(BLK) calibres. This model is machined from 8620 steel and has a nickel-boron finish that makes the BCG even more reliable. The bolt is high-pressure tested and magnetic particle inspected. Other components, such as carrier, gas key, cam pin, and firing pin also have the highest quality.

Video review

Pros:
  • Price
  • Durability
  • Nickel-boron finish
Cons:
  • Compatibility

 

14# Phase 5 Tactical AR-15 Bolt Carrier Group

Phase 5 Tactical AR-15 Black Complete Bolt Carrier Group

Specification

Mfg Item Num: BCG-AR15
Type: ACCESSORIES – GUN ACCESSORIES – GUN PARTS
Colour: Black
Finish: Phosphate
Master Model Header: AR-15 Black Complete Bolt Carrier Group

The last model on the list is the cheapest one. It doesn’t mean that it’s the worst one, but if your budget is limited, you should take a look at this bolt carrier group. The bolt has a phosphate finish and it is high pressure tested and MPI marked. Note that the gas key is not staked here. It’s not the best choice among all these models, but if you need a .223 Remington/5.56 NATO BCG for a low price, you can definitely take it.

Pros:
  • Price
  • HPT and MPI
  • Phosphate coating
Cons:
  • Durability
  • Not staked gas key

 

BONUS: CMMG, Inc 22LR Mk4 AR 15 BCG (+Barrel)

CMMG, Inc 22LR Mk4 Barrel Kits w/ Bolt Group

Specification

Colour: Black
Material: 4140 Chrome Moly
Caliber: .22 Long Rifle
Gun Model: AR-15

You can also consider buying a barrel kit with a bolt group. This one is suitable for M4 profiles and it’s made of 4140 Chrome Moly steel with salt bath nitride finish in and out. The overall length is 16.1 inches. This model works with a .22 long rifle calibre, which is not usual nowadays. Still, it doesn’t have a high price!

Pros:
  • Price
  • Durability
  • Easy to use and install
Cons:
  • Low on features

 

Installation 🔌

  1. 🔒 Ensure Safety: Before beginning any work on your AR-15, ensure the firearm is unloaded, the magazine is removed, and the chamber is empty. Practice proper firearm safety throughout the installation process.
  2. 🛠️ Disassemble Upper Receiver: Separate the upper receiver from the lower receiver if necessary for easier access to the BCG. Follow the manufacturer’s instructions or push out the takedown and pivot pins to separate the upper and lower.
  3. 🔄 Insert Charging Handle: Slide the charging handle into the upper receiver’s rear portion until it fully engages with the upper receiver and the latch extends outside.
  4. 🧲 Align BCG: Hold the BCG by the bolt carrier and align the bolt carrier’s key with the channel in the upper receiver. Make sure the cam pinhole is aligned with the upper receiver as well.
  5. ⬇️ Insert BCG: Insert the BCG into the upper receiver, ensuring that the charging handle engages with the BCG properly. The BCG should slide smoothly into place.
  6. 🔀 Rotate Cam Pin: Rotate the cam pin so that it aligns with the corresponding opening in the upper receiver. Ensure the cam pin is fully seated.
  7. ⬆️ Push in BCG: Push the BCG fully forward into the upper receiver until it is seated securely.
  8. 🔒 Reassemble Upper and Lower Receivers: If you had separated the upper and lower receivers, reassemble them by aligning the takedown and pivot pins and pushing them back into place.
  9. 🔒 Function Check: With the firearm fully reassembled, perform a function check to ensure the BCG operates properly. Ensure the charging handle moves freely, the BCG cycles smoothly, and the safety selector functions correctly.
  10. 🔫 Test Fire: Take your AR-15 to a safe and appropriate shooting range to test fire and ensure the proper functioning of the BCG and the entire rifle. Follow all local laws and regulations regarding firearm use.

We hope you found these steps helpful! As always, safety and proper handling of your firearm should be your top priority. Happy shooting! 🎯

We believe this video can be helpful for you 📺

FAQ ❓

What is the difference between Full Auto vs Semi Auto AR15 Bolt Carrier Group?

The main difference between a Full Auto and Semi Auto AR-15 Bolt Carrier Group (BCG) lies in the design and functionality. Here’s a comparison with corresponding emojis:

🔀 Full Auto BCG:

  • ✅ Full Auto (FA) BCGs are designed for use in fully automatic or select-fire AR-15 rifles.
  • ✅ The key distinction is the presence of a sear trip surface on the BCG, which engages with the auto sear in full-auto firearms.
  • ✅ FA BCGs typically have a longer rearward travel distance during cycling to accommodate the full-auto firing mode.
  • ✅ They have additional weight, resulting in a more substantial reciprocating mass for reliable full-auto function.
  • ✅ The FA BCGs may have a heavier construction or extra material in specific areas to enhance durability under full-auto fire.

⚖️ Semi-Auto BCG:

  • ✅ Semi-Auto (SA) BCGs are designed for use in semi-automatic AR-15 rifles, which fire one round per trigger pull.
  • ✅ SA BCGs lack the sear trip surface found on Full Auto BCGs since semi-automatic firearms do not utilize the auto sear.
  • ✅ They are typically lighter than Full Auto BCGs, reducing reciprocating mass for smoother operation and reduced recoil.
  • ✅ SA BCGs may have modified profiles or cuts to ensure compatibility with certain semi-auto rifles or configurations.
  • ✅ They are optimized for reliable cycling in a semi-automatic setting, offering a balance of durability and performance.

Please watch this video to learn more information 📺

How Does the AR-15 Bolt Carrier Group Work?
  1. 🔫 Firing: When the trigger is pulled, the hammer strikes the firing pin, which, in turn, strikes the primer of the cartridge. The ignited primer ignites the propellant inside the cartridge, creating high-pressure gas.
  2. 🌬️ Gas System: Some of the high-pressure gas is diverted through the gas port in the barrel and into the gas block, which is connected to the gas tube. The gas travels through the gas tube and enters the gas key on the BCG.
  3. ⬅️ Rearward Movement: The high-pressure gas pushes against the bolt carrier, causing it to move rearward. 💨 The BCG, along with the bolt, moves together as a unit.
  4. 🔄 Unlocking and Extraction: As the BCG moves rearward, the cam pin inside the bolt carrier rotates, unlocking the bolt from the barrel. The bolt unlocks from the chamber, allowing the spent cartridge case to be extracted.
  5. ⬇️ Ejection: As the BCG continues moving rearward, the extractor on the bolt grips the rim of the spent cartridge case. 💢 The ejector inside the bolt carrier pushes against the base of the cartridge case, ejecting it through the ejection port.
  6. ⬆️ Forward Movement: The BCG, driven by the recoil spring, moves forward. The bolt strips a new cartridge from the magazine and chambers it into the barrel.
  7. 🔒 Locking: The BCG continues moving forward until the bolt locks into the barrel, securing it in place for firing.
  8. 🔁 Ready to Fire: The AR-15 is now ready to fire again, and the cycle continues with the next trigger pull.
How to Choose AR-15 Bolt Carrier Group?

🎯 Intended Use: Consider the intended use of your AR-15. Are you building a target rifle, a competition firearm, a defensive weapon, or a lightweight setup for carrying? Different BCG features may be more suitable depending on your purpose.

💪 Quality and Reliability: Look for a BCG from reputable manufacturers known for producing high-quality components. A reliable BCG is crucial for consistent functioning and durability.

🔧 Material and Construction: BCGs are typically made from steel or lightweight aluminum alloys. Steel provides strength and durability, while aluminum offers weight savings. Choose a material that aligns with your priorities.

🌬️ Coating and Finish: Consider the coating or finish options available for the BCG. Common options include phosphate, nickel boron, chrome, DLC, titanium nitride (TiN), or nitride. Coatings offer enhanced corrosion resistance, lubricity, and durability.

⚙️ Weight and Balance: Determine your preference for weight and balance. A heavier BCG may aid in recoil management and reliability, while a lighter BCG can contribute to faster cycling and reduced felt recoil.

🔩 Compatibility: Ensure the BCG is compatible with your AR-15 platform, including proper gas system compatibility (direct impingement or piston-driven) and compatibility with the upper receiver.

💥 Full Auto vs. Semi Auto: Select the appropriate BCG variant based on your rifle’s configuration. Full Auto BCGs are compatible with both full-auto and semi-auto rifles, while Semi Auto BCGs are specific to semi-automatic firearms.

💲 Budget: Consider your budgetary constraints. BCGs vary in price, and while quality is essential, you can find options that fit within your budget without compromising performance.

🛡️ Reviews and Recommendations: Research and read reviews from trusted sources, and consider recommendations from experienced AR-15 owners or enthusiasts.

🔧 Warranty and Customer Support: Check the warranty and customer support provided by the manufacturer. A reliable warranty and responsive customer support can be valuable in case of any issues or concerns.

Watch this video to find more information 💻

How To Clean AR-15 Bolt Carrier Group?
  1. 🚫 Ensure Safety: Before cleaning, always ensure the firearm is unloaded, the magazine is removed, and the chamber is empty. Practice proper firearm safety throughout the cleaning process.
  2. 🛠️ Disassemble Upper Receiver: If necessary, separate the upper receiver from the lower receiver for easier access to the BCG. Follow the manufacturer’s instructions or push out the takedown and pivot pins to separate them.
  3. 🔀 Remove BCG: Grasp the charging handle and pull it fully to the rear, locking it in place. Push the rear of the BCG slightly upward and then pull it out of the upper receiver.
  4. 🌡️ Remove the Firing Pin and Cam Pin: Push the firing pin retaining pin, located at the rear of the bolt carrier, and remove the firing pin. Rotate the cam pin 90 degrees and pull it out of the bolt carrier.
  5. 🔩 Disassemble Bolt: Hold the bolt and twist the bolt cam pin, allowing the bolt to slide out of the bolt carrier. Separate the bolt from the bolt carrier and remove the extractor pin to release the extractor and spring.
  6. 🧼 Cleaning Solution: Use a suitable firearm-cleaning solvent or degreaser to clean the BCG components. Follow the solvent manufacturer’s instructions.
  7. 🧽 Scrub and Wipe: Use a nylon brush or toothbrush to scrub the carbon buildup and fouling from the BCG components. Wipe down all surfaces with a clean cloth or patches to remove excess solvent and debris.
  8. 🛡️ Lubrication: Apply a thin coat of lubricant to all moving parts of the BCG, including the bolt, firing pin, cam pin, and extractor. Pay attention to the key areas where metal surfaces interact and contact points.
  9. 🔁 Reassemble BCG: Reassemble the bolt components in the reverse order of disassembly, ensuring proper alignment and orientation. Insert the fully assembled bolt into the bolt carrier, aligning the cam pin hole and securing it with the cam pin. Insert the firing pin, align it with the firing pin retaining pin, and push the retaining pin back into place.
  10. ⬆️ Reinstall BCG: Insert the cleaned and lubricated BCG back into the upper receiver, aligning it with the charging handle and the upper receiver’s rails. Push the BCG fully forward until it seats securely.
  11. 🔒 Reassemble Upper and Lower Receivers: If you had separated the upper and lower receivers, reassemble them by aligning the takedown and pivot pins and pushing them back into place.
  12. 🔧 Function Check: With the firearm fully reassembled, perform a function check to ensure the BCG operates smoothly, the charging handle moves freely, and the safety selector functions correctly.

We believe this video can be helpful for you 📺

What Materials Are Used For Producing The Bolt Carrier Group?

🔩 Steel: Steel is widely used in BCG construction due to its strength, toughness, and durability. Different types of steel alloys, such as 8620 steel or Carpenter 158 steel, are commonly employed. Steel BCGs offer excellent reliability and are suitable for demanding applications.

🌟 Aluminum Alloy: Lightweight aluminum alloys, such as 6061 or 7075 aluminum, are sometimes used for BCG construction. Aluminum BCGs provide weight savings, reducing the reciprocating mass and improving handling characteristics. These BCGs are often preferred for lightweight builds or competition rifles where weight reduction is a priority.

💥 Titanium: Titanium BCGs are less common but offer significant weight reduction compared to steel or aluminum. Titanium is known for its high strength-to-weight ratio, corrosion resistance, and durability. Titanium BCGs are often chosen for lightweight or high-end custom builds.

🌬️ Coatings and Treatments: In addition to the base material, BCGs may also feature surface coatings or treatments for improved performance and protection against wear and corrosion. Common coatings include phosphate, nickel boron (NiB), chrome, diamond-like carbon (DLC), and nitride (such as Melonite or QPQ). These coatings enhance the BCG’s properties, such as lubricity, corrosion resistance, and ease of cleaning.

Conclusion ⏰

The Bolt Carrier Group (BCG) of an AR-15 rifle is a critical component responsible for the reliable functioning of the firearm. BCGs are typically made from durable materials such as steel, aluminum alloys, or titanium, offering a balance between strength, weight, and durability. Coatings and treatments like phosphate, nickel boron, chrome, DLC, or nitride can enhance the BCG’s performance and provide protection against wear and corrosion. The choice of BCG material depends on factors such as desired weight, intended use, and personal preferences. By selecting a high-quality BCG and properly maintaining it through regular cleaning and lubrication, AR-15 owners can ensure optimal performance and longevity for their firearms.✒️🛒

#Best #AR 15 #BCG #Bolt Carier Group #Upper #300 Blackout #5.56 #9mm #Lantac #308

Max Endless
Max Endless
Weapon Expert & School Teacher
Hi, I’m Max. I'm a weapon expert and a teacher of English from Belarus. These two qualities allow me to share my opinions and observations about news from the gun world. I'm really into firearms and different weapons because I was learning about them since my childhood.

My life has taken me through different complications and exciting moments, so what I’ve learned is to always be ready to fight. My father is professional military personnel and he made me familiar with various weapons since my childhood. My first one was a bow, and then I started to have a fancy for this unbelievable world of firearms. My main specialization allows me to share my thoughts about different devices, guns, and gun details with the English-speaking community. In my articles, I talk about pistols, rifles, knives, shotguns, and many other tactical and survival things.

Read more about our team of expert authors.

Affiliate Disclosure: Rotorm.com sometimes gets paid for listings, through sponsors or affiliate programs like Amazon, Optics Planet, Lucky Gunner, Brownells, Cabelas, Rainier Arms, 5.11 Tactical, Bass Pro Shop, etс. Clicking a link helps keep Rotorm.com free, at no extra cost to you!

About the author: Each article on our site is written by experts in survival and tactical equipment, gun enthusiasts, extreme travelers, military, law enforcement and desperate professionals, read about the author at the bottom of the article or visit "About Us" page.

Note: The views and opinions expressed in this article are those of the authors and do not necessarily reflect the official policy or position of any agency.

0 0 votes
Article Rating
Subscribe
Notify of
guest
12 Comments
Newest
Oldest Most Voted
Inline Feedbacks
View all comments
Bro
Bro
7 days ago

I am looking for bcg that will be used for competitions. Are there speccial designeg?

    Natalia
    Editor
    7 days ago
    Reply to  Bro

    🟣 Yes, you can find one. BCGs designed for competition use often prioritize lightweight construction, reduced reciprocating mass, and increased cycling speed for faster follow-up shots. They may incorporate skeletonized designs, lightweight materials, or low-friction coatings to enhance speed and reduce perceived recoil.

      Bear
      Bear
      7 days ago

      Greetings. How long does AR-15 BCG last?

        Natalia
        Editor
        7 days ago
        Reply to  Bear

        The lifespan of an AR-15 bolt carrier group (BCG) depends on the type of use and maintenance it receives.

        🟡 However, if the BCG is used in an environment where there is excessive dirt or grit, the lifespan could be significantly reduced.

        🟡 Additionally, if the BCG is used with ammunition that has higher than normal pressure, then its lifespan may be even shorter.

          Jerr
          Jerr
          7 days ago

          Most companies don’t manufacture their own BCGs, they outsource the manufacturing. However, there are differences between the brands like SOLGW, BCM, Scionics, etc. They vary in price and each company claims their BCGs are better than their competitors. LMT’s enhanced BCG is an exception. I’m unsure about what brand to purchase for my new upper and I want to make the right decision.

            Melory
            Melory
            7 days ago
            Reply to  Jerr

            AO Precision is selling phosphate BCG’s which have been MPI/HP tested for $80 along with a bottle of CLP. These are the exact same BCGs that are being used in the mil contract M4s by FN. It’s important to realize that BCGs, especially bolts, are disposable items that should always be kept as spares. No matter how much you obsess over different brands and spend money, it won’t change this fact.

              Silver
              Silver
              7 days ago
              Reply to  Jerr

              I haven’t seen the new Sionics np3, but I really like the coatings from Cryptic Coatings. They specialize in coatings, and their “Mystic Black” coating feels lubricated even when it’s dry. It’s so smooth that I’m worried my wife will find out. 

                Fellis
                Fellis
                7 days ago
                Reply to  Jerr

                I love the RCA high-molecular-weight coated bolt carrier group. It is easy to clean

                  Derect
                  Derect
                  7 days ago
                  Reply to  Jerr

                  It is important to choose a company. What sets a company apart from others is mainly its coatings and quality control, in addition to the original source OEM. BCM and SOLGW are great companies with good business practices, and their BCGs reflect that.

                    Snumber
                    Snumber
                    7 days ago

                    If you’re looking for an affordable and reliable bolt carrier group (BCG), consider the AO Precision brand. On sale, you can get them for only $69, which is a great deal. You can choose between Phosphate or Nitride finishes and both have been tested for MPI and HP. What’s great is that AO makes BCGs for the military and has government contracts, which gives you more reason to trust their products. While they may not be flashy, they are dependable and offer good value for the price.

                      Nickolas
                      Nickolas
                      7 days ago

                      Hello. Is it necessary to lube the bolt carrier group?

                        Natalia
                        Editor
                        7 days ago
                        Reply to  Nickolas

                        It is highly recommended that you lube your AR-15 bolt carrier group periodically.

                        ✅ This will help reduce friction and wear on the parts, increase reliability, and ensure smooth operation.

                        ✅ Lubrication also helps protect against corrosion, which can cause jamming or other malfunctions.

                        🟨 To properly lube your bolt carrier group, you should use a quality gun oil that contains both lubricants and anti-corrosion additives.

                        🟨 Make sure to thoroughly coat all parts of the BCG with the oil, including the inside of the carrier, the bolt itself, and any other components such as gas rings or extractors.

                        🛑 Additionally, avoid using too much oil; this can cause parts to become overly slippery and may lead to problems with cycling or other issues when firing. Proper care and maintenance of your AR-15 bolt carrier group are critical for ensuring reliable performance in the field.